7x+8=7x-21

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Solution for 7x+8=7x-21 equation: 


Simplifying
7x + 8 = 7x + -21

Reorder the terms:
8 + 7x = 7x + -21

Reorder the terms:
8 + 7x = -21 + 7x

Add '-7x' to each side of the equation.
8 + 7x + -7x = -21 + 7x + -7x

Combine like terms: 7x + -7x = 0
8 + 0 = -21 + 7x + -7x
8 = -21 + 7x + -7x

Combine like terms: 7x + -7x = 0
8 = -21 + 0
8 = -21

Solving
8 = -21

Couldn't find a variable to solve for.

This equation is invalid, the left and right sides are not equal, therefore there is no solution.

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